Transmission problems are a common concern for owners of 2018 Chevy Silverados. These issues can manifest in various ways, including:
Hard or Rough Shifting: Difficulty changing gears smoothly, often accompanied by jolts or vibrations.
Sudden Jerking: Uncomfortable and unexpected jolts during acceleration or deceleration.
Trouble Downshifting: Inability to shift down gears properly, resulting in reduced engine braking and increased fuel consumption.
Underlying Causes
The root causes of transmission problems in 2018 Chevy Silverados can vary. However, two common culprits include:
Transmission Control Module (TCM) Failure: The TCM is responsible for controlling the transmission’s gear changes. If it fails, it can send erroneous signals, leading to erratic shifting.
Torque Converter Failure: The torque converter acts as a fluid coupling between the engine and transmission. When it malfunctions, it can cause fluid leaks and ultimately transmission failure.
Additional Transmission Issues
Beyond the common problems mentioned above, 2018 Chevy Silverado owners may encounter several other transmission-related issues:
High Fuel Consumption: Faulty transmission components can lead to increased friction and reduced efficiency, resulting in higher fuel consumption.
Selector Switch Failure: The selector switch allows you to shift between gears. Its failure can make it difficult or impossible to shift the vehicle into the desired gear.
Million-Mile Transmission Issues: While Chevy advertised the 6L90 transmission in the 2018 Silverado as capable of lasting up to a million miles, some owners have reported transmission problems well before this claimed lifespan.
Transmission problems can have significant consequences for your vehicle’s performance, safety, and driving experience:
Difficulty Slowing Down or Speeding Up: Faulty transmissions can affect the vehicle’s ability to respond quickly to acceleration or deceleration commands.
Increased Risk of Accidents: Erratic shifting or sudden jerking can be distracting and increase the risk of accidents.
Damage to Other Vehicle Components: Transmission problems can strain other vehicle components, such as the engine and driveline, leading to additional expenses and repairs.
Solutions for Transmission Problems
Addressing transmission problems in your 2018 Chevy Silverado requires professional attention. Two primary solutions are available:
Replacement: Replacing the transmission is a costly but effective solution. However, it may be necessary if the damage is severe.
Repair: Certified repair shops can diagnose and repair transmission issues. This option can be more cost-effective than replacement if the problem is minor.
Considerations for Chevy Silverado Transmission Problems
Chevy Silverado models from 2012 to 2019 are more prone to transmission problems.
If you experience any transmission issues, it’s crucial to seek professional attention promptly to prevent further damage.
Lenfren Auto offers specialized repair services for Chevy Silverado transmission problems.
Specific Transmission Issues in 2011 6-Speed 18 Silverado 5.3
Diagnostic Steps: Check fluid level, remove and invert thermostat element in cooler bypass valve, consider replacing cooler bypass valve assembly with GM version.
Possible Resolution: The above measures may resolve issues related to elevated temperatures. Further investigation may be necessary for other problems.
